Gary p



' (NQModeL) v G. P. GOMBS & E. L. WETZ.

KEY.

No. 579,134. Patented Mar. 23, 1897.

INVENTOH5 WITNESSES: CM

W ATTORNEY.

lJNi'rnn TArns ATFNT FFTCE.

GARY P. COMES AND EDWARD L. WETZ, OF DAYTON, OHIO, ASSIGNORS TO DAVID E.BEEGHLEY AND JACOB H. BILLMAN, OF SAME PLACE.

SPECIFICATION forming part of Letters Patent No. 579,134, dated March23, 1897.

Application filed March 18, 1895. Renewed December 1D 1896. Serial No.615,232. (No model.)

To all whom, it may concern:

Be it known'that we, GARY P. COMES and EDWARD LWVETZ, of Dayton, countyof Montgomery, State of Ohio, have invented a new and useful Improvementin Keys; and we do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to the letters of reference markedthereon, which form a part of this specification.

Our invention relates to new and useful improvements in looks, and hasspecial reference to looks the keys of which may be inserted from eitherside, such, for example, as doorlocks.

The object of our invention is to improve the ordinary door-lock, whichas a rule offers little impediment to the entry of burglars, and torender it substantially burglar-proof.

In the annexed drawings, Figure 1 is a side elevation of an ordinarydoor-lock of the mortise type, the plate being removed to show theinternal mechanism. Fig. 2 is a longitudinal elevation of a key for saidlock. Fig. 3 is a side elevation of an end of said key, showing thepilot end of the key in section.

A designates the side plate of the lock, upon which the bolts and otherdevices are supported and in which the main bolt Bis retained in asliding position by a lug a.

b is a dog having a lug a, that fits in a slot b in said bolt. The dogI) is moved against the tension of a spring 0 by the flange cl of thekey f.

g designates a metallic plate which is secured to a lug g, that projectsfrom the inner face of the look. This plate g has a resilient nature andyields under sufficient pressure of the key, but which is stout enoughto maintain the key in the position shown in Fig. 1 after the bolt hasbeen thrown to lock the door. The key therefore cannot be gotten into aposition from without to be removed from the lock.

The feature of the invention appertains to the key 1'" and embodiesmeans for preventing the turning of the key from without. This consistsin constructing the pilot end t of an elliptical shape in sideelevation, forming an annular groove 1'.

i is a metallic cap that incloses the pilot end and is secured theretoby having its inner edge crimped or pressed into the groove '5. \Vhenthis cap is placed upon the end of the key in this manner, it may befreely turned thereon without the possibility of its removal.

. It is therefore plain that all efforts at turning the key from withoutthrough the use of pincers will be futile. A lock having these featurescannot be picked or manipulated by burglars who employ the usual meansfor gaining an entrance to residences, and no specially-constructed orexpensive lock is necessary. Any of the ordinary locks in use may befitted with our improvements.

We are aware that it is not new to make a specially-constructed lockwith means for holding the key in a position to prevent its beingtampered with. WVe are also aware that it is not new to construct thepilot end of a key in a manner to admit of its being turnedindependently of the key, said end being maintained in position by meansof a setscrew. Therefore we do not claim the same,

' broadly; but

\Vhat we claim is- A key having the pilot end reduced in size and anannular groove formed at the inner terminal of said reduced portion, anoblong cap inclosing said reduced portion and hav ing its inner endpressed into said annular groove whereby means are provided for pre- 8 5venting the key from being turned from without, substantially asdescribed.

In testimony whereof we have hereunto set our hands this 11th day ofMarch, 1895.

GARY P. COMES. EDWVARD L. WETZ.

Witnesses:

R. J MGOARTY, Lnsrnn L. ALLEN.

